tier-4: using a gun as self defense, including training on how to evaluate the effectiveness of a gun in certain situations, gun safety, laws and regulations on gun, and accuracy training. Requires one month of holding a tier 3 card, AND passing an exam to review tier 1-3 training at most 7 days prior to beginning tier-4 training.

At each level, you get an ID card that certifies you for certain tier. Only when you've completed tier-4 training should you be allowed to apply for a conceal carry permit.